Chromodoris strigata feeding on yellow sponge

March 10, 2009
From: Marcel Tanke

Concerning message #17461:

Hi Bill,
We found 3 Chromodoris strigata feeding on yellow sponge; a different type from what I could find in the C. strigata section.

Locality: Anilao, about 15 m, Philippines, 11 June 2008. Length: 3 cm max. Photographer: Marcel Tanke.

Best regards,
Marcel

marceltanke@cs.com

Tanke, M.A., 2009 (Mar 10) Chromodoris strigata feeding on yellow sponge. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22319

Dear Marcel,

Thanks for this record. Although I can't see any sign of actual feeding, the fact that three animals are all congregating on the same sponge colony would suggest they have more than a passing interest in it. C. strigata is a bit of a puzzle as far as its food in concerned. Out only earlier records suggest it feeds on dysideid sponges which are not usually eaten by species of Chromodoris. I am pretty sure the sponge in your photo is a species of Chelonaplysilla, which belongs to the sponge Family Darwinellidae, which is a chosen food of species of Chromodoris. Scott Johnson sent in a number of messages [see 12232] showing C. fidelis feeding on a number of species? colour forms? of Chelonaplysilla. Although not as brightly coloured as your sponge, the shape and structure of the colony is very similar. It will certainly be worth looking out for this species on similar sponges in the future.

Best wishes,
Bill Rudman

Rudman, W.B., 2009 (Mar 10). Comment on Chromodoris strigata feeding on yellow sponge by Marcel Tanke. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22319

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